Reenforcement for concrete



Jan. 23, 1923, 1,443,154.

G. E. THACKRAY. r

REENFORCEIVIENT FOR CONCRETE.

FILED MAY 24, i920.

Patented dan E3, lglt,

GEORGE E. THACKRAY, F WJESTMONT lBUROUGrH, PENNSYLVANI.

REENJFDRCEMENT FOR CONCRETE.

Application filed. May 24.

` To all whom t may concern.'

Be ity known that I, (3i-rosen lu-moirnAY, a citizenl of the United States, and a` resident of Westmont Borough, county of Cambria, and State of Pennsylvania, have invented certain new andL useful'I improveindividual coils and serve to strengthen the l ments in Reenforcements for Concrete; and ll do hereby declare the following to be full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertainsto make and use the same. y

My invention relates to a type of metal reenforcement for concrete, with special reference tothe coiled style of rod used Jfor reinforcing columns or struts for use in buildings, piles,or other similar constructions.

llhis reenforceme-nt consists of a continuous spiral heliX formed from a 'metal rod or 1 bar of any form orshape desired, which is made into a helix or spiralby bending upon the coil may be of any size, and the distance between the coils or pitch may be of any distance to suit the design. ln order to maintain the coil in position preparatory to placing concrete around it and to enable shipment of the same without deformation it is provided with two or more stifl'ener members, which are secured to all or part of the same and to maintain any pitch or distance apart of the individual coils as desired. The reenforcement when in use is in the form` of a skeleton of circular shape, the coils being secured to the stiffening members with a slight vclearance or looseness so that the coils can be collapsed or flattened or 'made compactfor shipment, and opened or restored to cylindrical form preparatory to being placed in position in the structure.

I ordinarily use two stiifenermembers arranged at opposite sides of the coil, but three or more can also be used, as will be readily understood.

When more than two stiffener members are used, and it is desired-to collapse the structure, the stiii'eners are slid together or diametrically opposite prior to collapsing the structure, and the coil can afterwards be opened to its cylindrical form preparatory to settingthe same in place and putting in concrete. rlhese stidening members hold the coil `in position while the concrete is being placed also and serve as longitudinal stiifeny ers in,` addition to the other longitudinal re-` 1920. Serial No. 383,623.

enforcement. The coil portions are used to resist the bursting pressure and the stiii'ener members assist in resisting the direct compilressiomin addition to holding the coils in p ace..

rlhe `forms of stiifener 'members l use and the manner of connecting them to the individual coils will be `more fully described hereafter.

Fach stiifener member is preferably composed of two parts, which may either be flats, or angles, an angle and one flat, or two angles, or one channel and one flat, or two channels, or a 'l' bar combined with a U bar, or a flat, or `a Z bar combined with a flat, or two angles arranged to form a Z bar, `or any combination of sections or bars as 'may be desired.

Referring now to the details of cdristruction; each of the two bars or shapes forming n each stiffening member isprovided with a a mandrel or otherwise and the rods `forming i plurality ofslots or notches corresponding to the size and shape of the coil rod, the bottom of each slot being preferably of semicircular form to receive a round coil rod, or of other shape to conform to the section of the rod of other shape, although the slots `:maybe rectangular, the only requirement being that they are slightly larger than the rod which they hold. y

The slots may be angular, or curved, or sinuous, or inclined, or straight, but l prefer to 'make them straight, as this is simpler and in this case;y the slots in all the bars may be punched or cut by the same tool.

l also prefer to form the slots slightly larger than the coil rod which they surround in order to permit the stiffener bars and coil to collapse for. shipment and enable the restorationthereof to a cylindrical form preparatory to use in a structure.

Having thus given a general description of my invention, I will now, in order to make the matter more clear, refer to the annexed sheetl of drawings, which forms part of this specification, and in whicht like characters referto like parts. i

Figure l is a side elevation of a portion of one form on my reinforcing member for concrete columns; Figure 2 is a top plan View of the reinforcingmember shown` in Figure l; Figure 3 is a side elevation of a portion of one form of stiener which I may use, drawn on a larger scale; Figure i is a transverse section of the form of stifener shown in `Figure 3; Figure 5 is a side elevation of a portion Foianother form offfstiifener or channel section; :Figure Gis a transverse section of the channel form of stitener shown in Figure 5; Figure 7 illustrates anotherform of stiffener member comprising two`tlat bars secured together; Figure 8 is a transverse, section of the stifener member shown in Figure 7 Figure 9 is a transverse section of another form of stitfener member composed of a channel anda flat bar; Figure 10 is a stiii'ener member, made ota T-bar and`- a U- bar or a fiat bent into U-shape; Figure 11 is a transverse section of Figure 10; Figure 12 is a side elevation of a portion of a Z-bar stiii'ener with a'flat lock bar secured thereto;"Figure 13 is a transverse section of the Z-bar and; ilat lock bar shown in Figure 12k; Figure 14 is a side elevation of a portion of a stiifener bar made of a pair of angles; Fig. 15v is a transverse section 'of the stiffening bar otFigure 14 made of. a pair of angles; Figureltis a. side elevation of a portion ot. a reinforcing bar'ot T-shape with a flat lock bar attached thereto; Figure 17 is atransverse section of the s titfening bar illustrated in Fig. 16; Fig. 18 is a transverse section of a pair of angles secured together and disposed so` as to form a stiiener of Z- shape'; Figure 19 lis a side elevation of a portion of' the bar shown in Figure 18, and Figure 2 0 is a-transverse section of a pair of angles secured together to form a stiiener ot channel form. 'Figures 21 and 22 show a pair of unequal leg angles adapted to form a lstiifening member arrangedl with their longer legs in contact and with their other legs projecting outwardly in opposite directions to form the general shape of a Z-bar. In Figure 21 the outer sidesot the longer legs are incontact and in Figure 22 the inner sides are in contact, and these angles may have slots in their longer legs of any ot the shapes shown in the other figures.

Referring now to the character of reference on the drawings 1 is my column reinforcement as a whole. 2 are angular stiffener bars as illustrated in Figures'l, 2, 3 and 4.-, each 'angle having a longer leg 34 and a shorter leg 4, 5 is a straight slot or notch in the longer leg in one of the angles, 6 is a curved or bayonet slot in the longer leg of the companion angle, 7 are rivets passing through pertorations provided in eachv angle to secure the two angles together, although instead of rivets, bolts may be used, or I may secure the two stiiiener barsftogether with twisted Wires or otherwise; 8 is a helical rod preferably composed of a continuous helix, although I may use separate rings, the ends of which are welded or otherwise secured together; 9 is a stiffener bar composed ottwo or angular bayonet slots.

ener bar is composed of two, Hats 12, and as illustrated in Figure 9 the stll'ener bar is composed ot a. channel. 18 and a llat plate 15; andas illustrated in Figures 10 and 11, the stitl'en'erbar is composed of a T-bar 1G provided with notches 17 in the stem thereof, the other portion o'f this stifener bar being composed of a U-shape member 1 8, which is provided with the notches 19 in the free marginal portions thereof. As illustrated in Figures 12 and 13, the stiiener bar Vis composed ot a Z-bar having web 20 and anges 21 with a. dat bar 22 secured thereto, the Z-bar being provided with the notches 23 and the flat bar with the notches` 24. As illustratedin Figures 14 and 15; the stiffener bar is composed ot two angles 25, one oiE which has a. straight slot or notch 26 and the other an angular or curved bayonet Slot 27. As illustrated in Figures 16 and 17, lthe stiffener bar is composed of a T-bar 28 provided with notches 29 in the stem thereof in connection with flat bar 30 secured to and having notches 31. Ars illustrated in Figures 18 and 19, the stiener bar is composed of a pair ot angles placed in position shown; forming a. con'ibined `section ot Z shape, each of these angles 32 being provided with straight notches 35. As illustrated in Figure 20, the stiffener bar is composed of two unequal leg angles 8-1, each provided with straight notches 35 in the longer legs and secured together with their shorter legs opposite each other.` forming a combined seetion ot' approximately channel shape.

In any of these constructions the two bars forming a stiii'ener bar may besecured together with rivets or bolts passing through registering holes, or by wires twisted around both members or otherwise as may be desired.

One ot the particular features ot my invention consists in forming stiffener bars ot' two pieces, each ot which is provided with a plurality ot slots adapted to partially ein` brace or surround the coils, or a series of rings or a helix and hold same in any position desired, the two members forming the stitt'ening bar. being sez'ured together in suoli a way that the indiyidual coils or rings are held in the position desired. The fastening of the stitt'ening bar to the `coils is not firm or rigid. iut. is provided with a small clearance to allow the bars to move relatively to the coils and the other stiifeners to permit the structure to collapse or to be restored to position as may be desired.

My stitliener member may be composed of two bars. each oi substantially thc same length, one oi which may be provided with a plurality of straight slots extending from the one edge thereofl yand the other may be pr vided with a similar plurality of curved Vhen these two bars are superimposed with the slots facing 1U i slots extending from one margin thereof,

in either direction and with the bases of the slots in registry, this forms a plurality of openings, in which the individual coils may be locked or held in position in the bases of the bayonet slots and are so held by contact with the sides of the straight slots, and when the two bars are secured together the coils cannot be displaced. l may also arrange the bars in a somewhat simpler form, namely zeach bar may have a plurality of straight while the other has a similar plurality of straight slots facing in the opposite direction, and when the two bars are placed together with bases of the slots in registry the coils are held therein. rlhe open slots permit the introduction of the coil rod in an easy and simple manner, and when the slots are closed the coils are held in position desired. l may also make one of these bars in fractional lengths instead of the entire length if so desired.

rlhe slots may also be slightly larger than the coil rod which they hold to allow easy rotation of the parts for collapsing for shipment and restoration of the coil to cylindrical form for use.

Although l have described and illustrated my invention in considerable detail, l do not wish to be limited to the exact and specific details thereof as shown and described, but may use such modifications in, substitutions for, or equivalents thereof, as are embraced within the scope of my invention, or as pointed out in the claims.

Having thus described my invention, what l claim and desire to secure by Letters Patent is l. A reinforcing member for concrete, comprising a helical metal coil, spacing and supporting members each consisting of two portions, each provided with open slots in which the individual coils are inserted, said portions being relatively positioned to close the marginal openings of the combined slots, and means for joining said portions.

2. A reinforcing member for concrete construction comprising a plurality of metal coils substantially parallel and spaced apart at predetermined distances, a spacer and support applied to said coils comprising two bars, each of whichis provided with marginal slots, relatively positioned over said coils so as to close the marginal openings of the slots and means for joining each pair of said bars.

3. A reinforcing member for concrete, comprising a helical meta-l coil, stiii'ening members secured thereto, each stiffener member being composed of two bars provided with marginal slots facing oppositely and adapted to register with each other, the indivdual coils being seated in said slots, and means for securing the two component parts of said stiffener bar together.

6. A -stiffener for reinforcing `members 7 composed of two metal bars, one provided with a plurality of straight marginal slots,

extending inwardly from the edge thereof,

the other bar being provided with a similar plurality of bayonet slots extending inwardly from one edge thereof, the bars being superimposed on each` other with the bases of the slots in registry, thereby forming a plurality of closed openings in the joined bars, and means for securing the bars together.

'i'. A stiffener for a reinforcing member comprising a pair of separate bars of flanged form, each provided with a plurality of open slots extending from one margin thereof, said bars being superimposed and relatively positioned to form registering openings at the bases of said slots with their Ientrances closed, and means for joining the ars.

8. A reinforcing member for concrete, comprising a helical metal coil, spacing and supporting members each composed of two portions provided with marginal slots adapted to .receive and support individual coils, said portions being superimposed and relatively positioned so as to close the marginal openings of the slots, and means for joining the portions of said spacing members together whereby the coils are secured and locked in position.

9. A reinforcing member comprising a helical metal coil, spacing and supporting members each composed of a pair of bars each provided with a plurality of slots in which the individual coils are inserted and means for joining each pair of bars together after the coils are in position therein, whereby the entrances to the slots are closed and the coils are supported and spaced apart.

10. A. reinforcing member comprising a helical metal coil, spacing and supporting members each composed of a pair of bars each provided with a plurality of open slots spaced apart andy adapted to receive the coils and means for joining said spacing members after they are superimposed and relatively positioned to close the slot entrances after the coils are in said slots, whereby the coils are secured in place.

il. .i reinforcing member for '-oncree emipifising zi helical metal coil, a. plurality supporting sind Spacing members each composed of. a pair of separate bars each provided withl a plurality of open slots spaced apart in which the coils are seated, the oars o'eaoh pair being superimposed and reialtivey positioned to' ciosethe marginal openings oiC seid slot-S whereby the coils are Secured and looked in place, and l0 niezuis for securing together the Component parts of each spacing member;

In Witness whereof I hereunto alx my signature.

GEORGE E. THACKRAY. 

